Related Articles

Neil deGrasse Tyson hosts a lively conversation about Selling Space with a panel of entrepreneurs and space historians at the 2014 Isaac Asimov Memorial Debate at the American Museum of Natural History. The Museum is live streaming the event at 7:30 EDT on Wednesday, March 19, at www.amnh.org/live.

This companion app for the exhibition The Power of Poison (open through August 10, 2014) allows you to solve cases of accidental poisoning. Investigations take you from a backyard to a 1700s ship to track toxic creatures, environmental hazards, and more. This free app is available for iPad.

Einstein recognized that his fame made it possible for him to serve as a powerful advocate for his deeply held political beliefs. A passionate humanitarian, he emerged from his shell to argue for the protection of human rights around the world.

With the turn of the 20th century, the field of physics underwent two major transformations, roughly at the same time. The first was Einstein's General Theory of Relativity, which dealt with the universal realm of physics. The second was Quantum Theory, which proposed that energy exists as discrete packets—each called a "quantum."